Antimicrobial agent

Disk content (µg)

Diameter zone (mm)

R (resistant)

I (intermediate)

S (sensitive)

Vancomycin

30

-

-

≥15

Ampicillin

2

≤26

27 - 35

≥36

Ciprofloxacin

5

≤15

16 - 20

≥21

Erythromycin

30

≤13

14 - 22

≥23

Streptomycin

10

≤11

12 - 14

≥15

Tetracycline

30

≤14

15 - 18

≥19